4. which of the following materials is necessary to stop a beta particle? (1 point)
three feet of concrete
three inches of lead
thin pieces of wood
single sheet of paper
5. a neutron breaks down to form (1 point)
an alpha particle
two protons
a proton and an electron
a helium nucleus
6. what does the band of stability for atomic nuclei refer to? (1 point)
the ratio of protons to neutrons
the ratio of neutrons to protons
the ratio of beta particles to neutrinos
the ratio of alpha particles to beta particles

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.

you need to have a picture of the atom that way we can answer it